Scion xB 2008, Stainless Steel Race Exhaust Header by Weapon-R®. Material: Stainless Steel. These free-flowing headers are designed to increase exhaust flow and make as much horsepower and torque as possible.

Scion xB 2.4L 2008, Replacement Exhaust Kit by Walker®. If you are looking for the ultimate in quality and value, then this superior replacement exhaust kit by Walker is what you need. All its components are designed with precision...

ACDelco Professional Oxygen Sensors earn the name ACDelco by being put through a variety of tests, often under extreme and unusual conditions.Customers can receive better gas mileage with a properly working oxygen sensor.

Scion xB 2.4L 2008, Oxygen Sensor by Delphi®. Connector Type: Square-4 Blade. Wrench Size: 7/8". As one of the leading suppliers of oxygen sensor technology since 1978, Delphi planar technology is the result of their OE and...

OE connectors and wire lengths within three inches of OE specificationsResists high temperatures, vibration damage and wire corrosion to protect signal accuracy, and long life

Scion xB 2.4L 2008, Downstream Oxygen Sensor by NTK®. Location: B1S2. This product is designed to improve engine efficiency and fuel mileage, while reducing emissions and extending catalyst life. The oxygen sensor is made of...

Scion xB 2.4L 2008, Rear Exhaust Muffler by Ansa®. This premium part is essential for completing a professional exhaust installation. The key a well-functioning vehicle is about purchasing only premium quality parts and hardware....

Engineered to provide excellent exhaust system managementBuilt to the strict quality standards

Scion xB 2.4L 2008, Exhaust Pipe by Ansa®. This premium part is essential for completing a professional exhaust installation. The key a well-functioning vehicle is about purchasing only premium quality parts and hardware. ANSA...

Engineered to provide excellent exhaust system managementBuilt to the strict quality standards

Scion xB 2.4L 2008, Insulator by Walker®. With their extensive selection of accessories and hardware for the exhaust system, Walker will provide you with everything needed to do the complete exhaust job. When you choose Walker...

Scion xB 2008, Exhaust Gasket by Bosal®. Is your car noisier these days? Can you smell exhaust fumes in the cabin? Exhaust system repairs should not be put off, both for safety and legal reasons, but before you waste your time and...

Scion xB 2.4L 2008, Exhaust Manifold Gasket Set by Fel-Pro®. If you need durable gaskets to prevent leaks on your vehicle, Fel-Pro is the way to go. Engineered using the latest technologies and global engineering resources, the...

Scion xB 2.4L 2008, Exhaust Manifold Gasket Set by DNJ Engine Components®. Get this top-grade quality replacement for your worn out part from DNJ. Expertly crafted from premium materials, this product is of the finest quality to...

Designed to restore your vehicle's original performanceProvides superior sealing performance

Scion xB 2.4L 2008, Donut Exhaust Gasket by Walker®. With their extensive selection of accessories and hardware for the exhaust system, Walker will provide you with everything needed to do the complete exhaust job. When you choose...

Scion xB 2.4L 2008, Front Converter Exhaust Flange Gasket by Bosal®. Location: Front Converter. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job...

Scion xB 2.4L 2008, Exhaust Pipe Flange Gasket by Fel-Pro®. If you need durable gaskets to prevent leaks on your vehicle, Fel-Pro is the way to go. Engineered using the latest technologies and global engineering resources, the...

Scion xB 2.4L 2008, Exhaust Gasket by Ansa®. This premium part is essential for completing a professional exhaust installation. The key a well-functioning vehicle is about purchasing only premium quality parts and hardware. ANSA...

Engineered to provide excellent exhaust system managementBuilt to the strict quality standards

Scion xB 2.4L 2008, Exhaust Nut by Walker®. With their extensive selection of accessories and hardware for the exhaust system, Walker will provide you with everything needed to do the complete exhaust job. When you choose Walker...

Guides & Articles

Performance exhaust systems give you improvements in power output, sound levels, and appearance, all in one package. But let's face it: not everyone has the spare change to buy and
bolt up one of these kits. So you soldier on with what you have. And that may be a tired-looking exhaust system that is still functional. You've spent all day washing and waxing the
vehicle's paint and chrome to perfection, but no degree of elbow grease will make that tailpipe look better.

Engines have often been compared to air pumps, because the engine that’s most efficient in terms of economy and power is the one that can get air in and out of its cylinders the easiest. That’s why most performance modifications like conical air filters, cold air intake systems, headers, and cat-back exhaust systems are aimed at making the intake and exhaust systems less restrictive. These parts increase the flow of air into the engine and ease the flow of exhaust gas out of the engine. Among these components, headers may be the most difficult to install. In this article, we’ll discuss what headers do, their different types, and how much performance they can add to your car.

You may be wondering why so many aftermarket performance exhaust system manufacturers are offering dual exhaust systems connected by "H-pipe" or "X-pipe" sections. After all, aren't two separate pipes, or so-called "true duals", the best for performance? The answer is no, but to understand why we have to examine how a typical internal combustion engine works.

It's an age-old question that many have asked. Will an aftermarket exhaust be worth the expense? While they definitely can be, an important question to ask yourself is do you care more about the deeper sound they’re designed to produce, or the added performance gained from being less restrictive? As car enthusiasts, we’ve become accustomed to associating the sound of a car with its exhaust. After all, doesn’t everyone have a childhood memory or two of a car and the particular sound it made?

Americans love to have choices. Buying a dress shirt? Decide solid or stripe, short or long sleeve, cotton or poly blend, button or spread collar, regular fit, slim fit, or big & tall. How about a meal at your favorite steak house? Will it be porterhouse, T-bone, or sirloin? Cooked rare, medium-rare, or medium? With baked, mashed, or French fried potatoes? Thirsty for a fancy cup of coffee? Let's not even get started on options that let you end up with a "grande caramel macchiato with 1% low-fat milk, 2 Splendas, and an extra espresso shot".

Regardless of whether you're shopping for a simple replacement muffler that delivers original equipment (OE) sound and performance or an upgraded muffler which provides a deeper growl with increased power through freer exhaust flow, you'll see choices between "direct fit" mufflers and "universal" mufflers. In this article, we'll help you understand the differences between these two styles so you can make a more informed purchase.

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